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Avoid left-shifting bits into the sign of a signed integer, as such behavior 

is technically undefined.

FossilOrigin-Name: 9417b4021b779876dcb3b9be636f01f4055eb54e
This commit is contained in:
drh 2015-07-08 01:22:52 +00:00
parent 4297c7c4be
commit e56d43010d
3 changed files with 8 additions and 8 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Add\sa\scompile-time\sconstant\sfor\sconfiguring\sthe\sdefault\spagecache\ssetup. C Avoid\sleft-shifting\sbits\sinto\sthe\ssign\sof\sa\ssigned\sinteger,\sas\ssuch\sbehavior\nis\stechnically\sundefined.
D 2015-07-07T21:14:42.575 D 2015-07-08T01:22:52.331
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 017bf0511d1b2dd1db5e16488fbf75a17b526cbc F Makefile.in 017bf0511d1b2dd1db5e16488fbf75a17b526cbc
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -269,7 +269,7 @@ F src/auth.c b56c78ebe40a2110fd361379f7e8162d23f92240
F src/backup.c 4d9134dc988a87838c06056c89c0e8c4700a0452 F src/backup.c 4d9134dc988a87838c06056c89c0e8c4700a0452
F src/bitvec.c d1f21d7d91690747881f03940584f4cc548c9d3d F src/bitvec.c d1f21d7d91690747881f03940584f4cc548c9d3d
F src/btmutex.c 45a968cc85afed9b5e6cf55bf1f42f8d18107f79 F src/btmutex.c 45a968cc85afed9b5e6cf55bf1f42f8d18107f79
F src/btree.c 740ab30df845f4a2c2bdb731ed191b4b63b2b2eb F src/btree.c 781deff0d5af639e8dd4f83ec963cc3bbf8cffc2
F src/btree.h 969adc948e89e449220ff0ff724c94bb2a52e9f1 F src/btree.h 969adc948e89e449220ff0ff724c94bb2a52e9f1
F src/btreeInt.h 2ad754dd4528baa8d0946a593cc373b890bf859e F src/btreeInt.h 2ad754dd4528baa8d0946a593cc373b890bf859e
F src/build.c b3f15255d5b16e42dafeaa638fd4f8a47c94ed70 F src/build.c b3f15255d5b16e42dafeaa638fd4f8a47c94ed70
@ -1364,7 +1364,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
P 26db0fee06947d75621237a641b9652b312b3b37 P ad5fdfbac85682f0f0dee62e1086f40026a58be2
R eddaba760dcd1fbd940dd405a17b49da R ffdb1dc8cf76fb977c83d0c8ad3dcce5
U drh U drh
Z 4021e6ca5eea0db9e457b6c7679c87e9 Z 1578fd578fb2f64903bdcd3127f0d5d4

2
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@ -1 +1 @@
ad5fdfbac85682f0f0dee62e1086f40026a58be2 9417b4021b779876dcb3b9be636f01f4055eb54e

2
src/btree.c
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@ -9119,7 +9119,7 @@ static int checkTreePage(
assert( (u32)i<=usableSize-4 ); /* Enforced by btreeInitPage() */ assert( (u32)i<=usableSize-4 ); /* Enforced by btreeInitPage() */
size = get2byte(&data[i+2]); size = get2byte(&data[i+2]);
assert( (u32)(i+size)<=usableSize ); /* Enforced by btreeInitPage() */ assert( (u32)(i+size)<=usableSize ); /* Enforced by btreeInitPage() */
btreeHeapInsert(heap, (i<<16)|(i+size-1)); btreeHeapInsert(heap, (((u32)i)<<16)|(i+size-1));
/* EVIDENCE-OF: R-58208-19414 The first 2 bytes of a freeblock are a /* EVIDENCE-OF: R-58208-19414 The first 2 bytes of a freeblock are a
** big-endian integer which is the offset in the b-tree page of the next ** big-endian integer which is the offset in the b-tree page of the next
** freeblock in the chain, or zero if the freeblock is the last on the ** freeblock in the chain, or zero if the freeblock is the last on the